/**
 * Copyright (c) 2012 Sean Beecroft, Permission is hereby granted, free of
 * charge, to any person obtaining a copy of this software and associated
 * documentation files (the "Software"), to deal in the Software without
 * restriction, including without limitation the rights to use, copy, modify,
 * merge, publish, distribute, sublicense, and/or sell copies of the Software,
 * and to permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 * 
 * For more information on this project and others, please visit my google code 
 * repository:
 * https://code.google.com/u/seanbeecroft@gmail.com/
 */

package javaballs;

import java.util.ArrayList;
import java.util.TimerTask;
import java.util.Vector;

public class Engine extends TimerTask {

    boolean bb = false;
    double pos = 0;
    double m = 16.72; // how bouncy? Higher = more
    double g = 0.2; // gravity
    int n = 0;
    double f = 1.25; // friction

    private double f( double v)
    {
        v = v + g;
        return v;
    }

    public void run()
    {
        ArrayList<Ball> balls = Main.getBalls();

        for(int i = 0; i < balls.size(); i++ ){
                Ball b = (Ball)balls.get(i);
                // add gravity
                b.setVy(f(b.getVy()));
                //b.setVx(f(b.getVx()));
                b.setY(b.getY() + b.getVy());

                if( b.getY() + b.getWidth() >= (Globals.app.getHeight()-100) ){
                    b.setVy(-(Math.abs(b.getVy()) - (b.getVy() / m))) ;
                    b.setY(b.getY() - 1);
                }

                b.setX((int) (double) b.getX() + b.getVx());
                if( b.getX() + b.getWidth() > Globals.app.getWidth() ){
                    b.setVx(-b.getVx()/f); // friction

                } else if( b.getX() < 0 ){
                    b.setVx(-b.getVx());
                }
        }
    }
}
